In her sophomore year chemistry class, Lin Xia lost her focus and dropped the pencil in her hand. She bent down to pick it up. When she looked up, she saw the teacher in a suit, the classmate with the mole behind her ear, the childhood sweetheart who smiled at her - everything in this world was misaligned with reality. In the pocket of her school uniform, there was a notebook of "Organic Chemistry" that did not belong to her. On the title page was a photo taken with "transfer student Lu Chen" when she was seven years old. But in reality, the fire that happened when she was seven years old had already burned all her childhood photos.
